Aryl azides as photolabels. Retention of iodine during photochemical ring expansion of an iodinated tyrosine derivative

Article abstract of DOI:10.1016/S0040-4039(00)97384-2

In contrast to the photochemical behaviour of iodinated aromatic azides with iodine and azide in the same ring, iodinated N-(4-azidobenzoyl)tyrosine readily undergoes singlet photochemistry with ring expansion and trapping of nucleophiles while retaining